Goodwill and Acquired Intangible Assets - Summary of Changes in Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 21,501
Final adjustment to Eversurance purchase price allocation	0	$ 0
Goodwill, Ending Balance	$ 21,501	$ 21,501